Stock Market Power Rankings: Last Call for Facebook

Each week, I'm ranking the biggest companies that trade on U.S. exchanges based on their size ( market capitalization), momentum (total return over the past year), and recent news. Before we get to the rankings, a quick word on a major player.

Facebook (NASDAQ: FB) is not at its best these days. Usage growth is slowing at the world's largest social network, data privacy concerns are bubbling, and your ex is doing just fine without you. Facebook shares have shed nearly a fifth of their value over the past year, making this the only stock in my current top 10 that has not appreciated year over year.

The former dot-com darling is trying to clean up its act. It announced last week that it has taken down 14 million pieces of terrorist content from its site, with the median time to take action averaging less than two minutes in its latest quarter. It recently blocked 115 accounts that may have been engaged in "coordinated inauthentic behavior" ahead of last week's midterm elections.